A zettel representation that is a [s-expression](00001012930000) (also known as symbolic expression).

It is (relatively) easy to parse and contains all relevant information of metadata, content or the whole zettel.
For example, take a look at the Sz encoding of this page, which is available on the “Info” sub-page of this zettel:

* [/z/00001012920516?enc=sz&part=zettel](/z/00001012920516?enc=sz&part=zettel),
* [/z/00001012920516?enc=sz&part=meta](/z/00001012920516?enc=sz&part=meta),
* [/z/00001012920516?enc=sz&part=content](/z/00001012920516?enc=sz&part=content).

Some zettel provide a more detailed description of the [Sz encoding](00001012931000).

If transferred via HTTP, the content type will be `text/plain`.